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Merge pull request #13 from david-ryan-snyder/xvector
xvector: nnet3-xvector-merge-egs, etc
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| // xvectorbin/nnet3-xvector-merge-egs.cc | ||
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| // Copyright 2016 David Snyder | ||
| // 2012-2015 Johns Hopkins University (author: Daniel Povey) | ||
| // 2014 Vimal Manohar | ||
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| // See ../../COPYING for clarification regarding multiple authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED | ||
| // WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, | ||
| // MERCHANTABLITY OR NON-INFRINGEMENT. | ||
| // See the Apache 2 License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #include "base/kaldi-common.h" | ||
| #include "util/common-utils.h" | ||
| #include "nnet3/nnet-example.h" | ||
| #include "nnet3/nnet-example-utils.h" | ||
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| int main(int argc, char *argv[]) { | ||
| try { | ||
| using namespace kaldi; | ||
| using namespace kaldi::nnet3; | ||
| typedef kaldi::int32 int32; | ||
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| const char *usage = | ||
| "This copies nnet examples for xvector training from input to\n" | ||
| "output but while doing so it merges many NnetExample objects\n" | ||
| "into one, forming a minibatch consisting of single NnetExample.\n" | ||
| "Unlike nnet3-merge-egs, this binary does not expect the examples\n" | ||
| "to have any output.\n" | ||
| "\n" | ||
| "Usage: nnet3-xvector-merge-egs [options] <egs-rspecifier> " | ||
| "<egs-wspecifier>\n" | ||
| "e.g.\n" | ||
| "nnet3-xvector-merge-egs --minibatch-size=512 ark:1.egs ark:- " | ||
| "| nnet3-xvector-train ... \n" | ||
| "See also nnet3-copy-egs and nnet3-merge-egs\n"; | ||
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| bool compress = false; | ||
| int32 minibatch_size = 512; | ||
| bool discard_partial_minibatches = false; | ||
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| ParseOptions po(usage); | ||
| po.Register("minibatch-size", &minibatch_size, "Target size of " | ||
| "minibatches when merging."); | ||
| po.Register("compress", &compress, "If true, compress the output examples " | ||
| "(not recommended unless you are writing to disk)"); | ||
| po.Register("discard-partial-minibatches", &discard_partial_minibatches, | ||
| "discard any partial minibatches of 'uneven' size that may be " | ||
| "encountered at the end."); | ||
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| po.Read(argc, argv); | ||
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| if (po.NumArgs() != 2) { | ||
| po.PrintUsage(); | ||
| exit(1); | ||
| } | ||
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| std::string examples_rspecifier = po.GetArg(1), | ||
| examples_wspecifier = po.GetArg(2); | ||
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| SequentialNnetExampleReader example_reader(examples_rspecifier); | ||
| NnetExampleWriter example_writer(examples_wspecifier); | ||
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| std::vector<NnetExample> examples; | ||
| examples.reserve(minibatch_size); | ||
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| int32 num_read = 0, num_written = 0; | ||
| while (!example_reader.Done()) { | ||
| const NnetExample &cur_eg = example_reader.Value(); | ||
| examples.resize(examples.size() + 1); | ||
| examples.back() = cur_eg; | ||
| bool minibatch_ready = | ||
| static_cast<int32>(examples.size()) >= minibatch_size; | ||
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| // Do Next() now, so we can test example_reader.Done() below . | ||
| example_reader.Next(); | ||
| num_read++; | ||
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| if (minibatch_ready || (!discard_partial_minibatches && | ||
| (example_reader.Done() && !examples.empty()))) { | ||
| NnetExample merged_eg; | ||
| MergeExamples(examples, compress, &merged_eg); | ||
| std::ostringstream ostr; | ||
| ostr << "merged-" << num_written; | ||
| num_written++; | ||
| std::string output_key = ostr.str(); | ||
| example_writer.Write(output_key, merged_eg); | ||
| examples.clear(); | ||
| } | ||
| } | ||
| KALDI_LOG << "Merged " << num_read << " egs to " << num_written << '.'; | ||
| return (num_written != 0 ? 0 : 1); | ||
| } catch(const std::exception &e) { | ||
| std::cerr << e.what() << '\n'; | ||
| return -1; | ||
| } | ||
| } | ||
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